Ferrous sulphate is a salt with the formula FeSO4. It is used medically to treat iron deficiency, and also for industrial applications.

Ferrous Sulphate is produced in 2 forms, Monohydrate and Hyptahydrate. The difference between the products is the degree of drying it underwent. Monohydrate has been dried further than Hyptahydrate, and is freer flowing.


  • Neutralising agent for Cyanide solutions
  • Fertilizers
  • A source of the red pigment, ferric oxide
  • As a stock feed micro ingredient


(i) Ferrous iron (as Fe) per rent by weight, minimum 19.0
(ii) Free Acid (as H2SO 4), per cent by weight, maximum 1.0
(iii) Ferric Iron (as Fe), percent by weight, maximum 0.5
(iv) Matter insoluble in water, percent by weight, maximum 1.0
(v) pH not less than 3.5
(vi) Lead (as Pb) per rent by weight, maximum 0.003
(vii) Sulphur (asS),percent by weight, minimum 10.5

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